TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
Page 242 of 1176
TM 9-2320-361-24-1 0014 00 0014 00-6 INDICATORS, GAUGES, AND WARNING SYSTEM TROUBLESHOOTING (Contd) Table 1. Indicator, Gauges, and Warning System Troubleshooting (Contd). MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 3. FUEL GAUGE INOPERATIVE WARNING Do not perform testing near fuel tank with fill cap or sending unit removed. Fuel may ignite causing injury to personnel. NOTE • Before performing test, ensure fuel tank is full. • IF STE/ICE-R is available, perform NG 31 gauge test (WP 0018 00). Test 1. Test for battery voltage to fuel level sending unit. 1. Disconnect lead 28 from fuel level sending unit. 2. Set multimeter to a voltage range that will measure 24 VDC. 3. Connect negative lead to frame ground and touch positive lead to contact end of lead 28. Test 2. Test fuel gauge operation. 1. Turn power accessory switch to OFF position. 2. With lead 28 already disconnected from sending unit, touch contact end to frame ground. 3. Turn power accessory switch to ON position. 4. Fuel gauge should read empty. 5. Lift lead 28 from frame ground. Fuel gauge should now read full. Test 3. Test fuel gauge voltage. Go to WP 0014 00, table 1, malfunction 1, test 2, and check battery voltage into fuel gauge. 1. If battery voltage is present, go to test 2. 2. If battery voltage is not present, go to test 3. 1. If fuel gauge shows empty, go to step 5. 2. If fuel gauge does not show empty, replace fuel gauge (WP 0095 00). 1. If fuel gauge shows full, it is operational. Remove fuel level sending unit (WP 0109 00) and go to test 5. 2. If fuel gauge does not show full, replace fuel gauge (WP 0095 00).